Re: Apple Disk Server Beta. Need testers.

[Egan Ford <datajerk@gmail.com>]

On Jan 6, 12:04 am, Michael J. Mahon <mjma...@aol.com> wrote:
> Egan Ford <dataj...@gmail.com> wrote:
> > On Jan 5, 2:46 pm, David Schmidt <schmi...@my-deja.com> wrote:
> >> On 1/5/2012 4:39 PM, Egan Ford wrote:
>
> >>> On Jan 5, 2:21 pm, "Michael J. Mahon"<mjma...@aol.com>  wrote:
> >>>> David Schmidt wrote:
> >>>>> Oh, one other thing I forgot to mention: one speedup that ADT client
> >>>>> does (but not ADTPro - too lazy so far) is it starts the drive motor a
> >>>>> little while before it is needed.  That avoids the spin-up delay once a
> >>>>> full buffer is ready to write and lets you start writing much more
> >>>>> quickly.  So, during inflate, if there's a point where you're
> >>>>> "almost-done," one loop left to go or whatever, hit the motoron switch.
>
> >>>> For reliable operation, the motor should be started about a second
> >>>> before the disk is required to be up to speed.
>
> >>>> -michael
>
> >>>> NadaNet 3.1 for Apple II parallel computing!
> >>>> Home page:  http://home.comcast.net/~mjmahon/
>
> >>>> "The wastebasket is our most important design
> >>>> tool--and it's seriously underused."
>
> >>> What about 10 seconds before?  Is more OK?
>
> >> Well, yeah, you could just leave the blasted thing running... but you'd
> >> better be able to turn it back off again in case of failure.
>
> > 1.  Turn after download, but before inflate
> > 2.  If inflate fails, turn off before error message
> > 3.  If inflate ok, write starts, end of write should power down motor,
> > right?
>
> > I am thinking that this will save about 5 seconds out of 3 minutes.
> > It may not be worth it.
>
> I thought that RWTS waited for several seconds after motor on if it
> detected that the drive had stopped. So that would be several seconds times
> the number of restarts.
>
> -michael - NadaNet 3.1 and AppleCrate II:http://home.comcast.net/~mjmahon

Looks like about 1 second.  Perhaps 2.  If you watch my video you can
see that I write the block to the screen first, then motor starts,
then write.  I think its about 1-2 seconds.